Engine



Aug. 14, 1923. 1,464,996

c. w. MOTT ENGINE Filed Nov. 28. 1919 3 Sheets$heet 1 7 520672507" Can-Z L2 Aug. 14, 1923.

1,464,996 c. w. MOTT ENGINE Filed Nov. 28, 1919 5 Sheets-Sheet 3 CarZjfjfgg Patented Aug. 14, 1923.

. UNITED STATES PATENT OFFICE.

CARL W. MOTT, OF STERLING, ILLINOIS, ASSIGNOR TC FORT DEAR-BORN MANUFAC- TUBING CO., OF STERLING, ILLINOIS.

ENGINE.

Application filed November 28, 1513. Serial No. 341,058.

. Mypinvention vrelates to new and'useful improvements in engines and particularly in l-internalicombustion engines, and is fully described in the following specification and shown-v the accompanying drawings, in iWh l'i-fui Figure lisayertical longitudinal section otan-en'gine embodying my invention.

Eig'ure 121s ajpartial enlarged section on Fthe saimevplane as Fig. l; and

" :zFigure 3-,is the same but'shows a modi- =fied 12ut. preferred form of the invention.

0 .1 invention is closely related to the .invention disclosed in my co-pending application Serial ;No.,\333,463, filed OcLoberQT,

I have dllii strated my present invention in connection with an internal combustion ;engine having a-gcmirkcaseltlhaving large side;openings l1 and l2 in'which are secured I *oover-platesj13 and 1 4:, respectively. vThe latter carries-the crank shaft 15 which I have preferablyjournaled in two ball-bearings 16 and 17 the former being mounted in a housing forming apartof the cover-plate. :Thisbearingjhas only the inner race held preferably by means of a press fit and a wire ring-,-,16f,;and is therefore free to align itself {iILltS housing. The bearing 17 is mounted in a housing 17.and has its inner and outer -races secured, respectively, to. the shaft by :the cap-screw 15 andto the housing '17 and-the cover-plate laby the ring 17 and the screws .17, so that it is held against endiwise thrust in either direction.

s The shaft 15 carries the flywheel 18 which Ithavepreferably vcast integral therewith. The wrist-pin 19 passes through'the flywheel and the inner race of the ball-bearing 20; thereby-securing the-inner race to the fly-wheel. A connecting rod 21 has its lower end secured to the outer race of the ball bearing 20 by means of a split end, a bolt 21 and a notched washer. The other end is connected to the piston 22 by a piston pin 23. The iston reciprocates in the cylinder 24 whlch has a cylinder head 25. Both are preferably held in assembled position by four bolts 26, which are screwed into the crank-case casting.

The cylinder has a series oflongitudinul iins 27 cast thereon and is surrounded by a jacket 28 through which air for cooling the cylinder is drawn, as will later be explained. This jacket is bolted to the casting forniing the cover plate 13. 1 y

, The inlet valve (notgshown) is preferably antoinati cally operated while the exhaust valve 29 isoperated by means of-rocker arm 29*, a valve rod 30 and the mushroom fol- .lower 3l froin a. cam 32 on the cam-shaft 33 whichis preferably driven at half crank shaft speedby the gears 34 and 35 keyed on the cam shaft and crank shaft respectively. The cum shaft has two enlarged bearing surfaces which are journaled in the casting forming the cover plate l4, and which are large enough to permit tl1e:ca1n 32 to be inserted and withdrawn endwise. A head 33?,0n one end of a pirr33lbehind the gear 34 prevent endwise movement. i ,1 A magneto-36 is driven from the cam shaft by means of a couplin 31, and issupported on a bracket 38" whicii is .part of the hous ing 38, and is held inplace by a ciip 39 and a stud 40.. The housing 38 surrounds the gearsand is. bolted to the crank case 10.

The crank (-ase casting also acts as a base and supports a. generatorxil. which'is driven from the crank-shaftthrough the gears 4-2 and 4:3 which are keyed to the generator shaft and crank shaft, respectively.

. Bolted to the cover plate 13 is a ;housin 44. These'carry ball-bearings and 46 an each has a shoulder adapted to receive the endwise thrust of the .outer race. The inner races carry a fan shaft 47 which is secured thereto in any suitable way as by means of pins 48. This shaft carries a drive smlley 49 and a fan 50 preferablyof-the irocco type having a closed side 50, a side .30" having'a central opening for the air and curved peripheral blades 50. The fan shaft is driven from the-crank pin 19 through the bushing 51 which is slidable in a slot 52in an arm 53 which is keyed to the fan shaft.

In Fig. 3 I have shown a modified but preferred form of my invention, in which the magneto 36 is mounted on a bracket 38 having a disk-like plate 38 covering the circular openin 38 in the housing 38". The magneto is preferably driven from the cam shaft by means of a flexible coupling 37.

438- and 59, the latter is serewedonwelement In either case the importance of my construction is that the magneto can be'mounted on the bracket 38'? and assembled or disassembled as a unit and Without disturbing any other parts.

In this form I have also placed the gear 43 between the bearings 16 and 17 and have made it smaller than the casing of the bearing 16, so that it can be assembled or disassembled as a unit with the shaft and the bearings 16 and 17. The gear 43 meshes with the gear 42 on the-intennediate shaft 57 which is journaled in the ball-bearings being retained by the plate 17". The shaft :37 preferably has a shouldered'and threaded extension on which of a flexible coupling. An oil disk (31 is held between the shoulder and said element and picks up oil anddelivers it to the'gear A felt washer (52 surrounds the coupling element 60 and is'held'hetween a shouldefithereon and a -co1-inter l)o\v in the housing 38. The correspondingcoiipli'ng element 63 is keyed to the armature shaft of the-generator 41.

-which operates through the governor rod to"cbntrol' the throttle valve 56.

The cylinder is-oooled by air drawn in from'above it and between'it and the jacket 28, thereby cooling-'the head'25 and 'the fins 27. This heated air'then passes down through the passage sur'roundin the breiithe'r tu'be='59, into the center of the fan and-'o'ut-radially through'the fan blades.

It will be apparent to anyoneskilled in this art that the construction and method 0f mounting and assembling the crankshaft and=assodiated parts is novel and that it combines in this engine the splendid wearing qualitiesof ball-bearings with amounting which is easy to assem'ble'and adjust and economical of manufacture.

This of) ine particularly adapts itself to a. standa ization of interchangeable parts a'ndto assembly by' uhits. The cranlishaft and cam shaft are assembled at a-bench and mounted in'the crank case as a'unit. The cylinder, piston and connecting rod are mounted as a'imit. The fan shaft is HSSQIYF bled and'r'n'on'nted' as another unit. "The ehrbureter, magneto and generator are mounted as separate andcomplete units. 'Owi'ng to the m'ethod of'mo'unting the fan shaft; the magneto and the intermediate shaft, any slightvariation in alignment due to manufacture will be taken care of.

7 I While I have shown and described but two embodimnts oflmy inwefitionfiitr'is'w be un- ..derstood that it,

tirations.

Changes therefore struction and' fil'i'fzin'ge'fneht" may 18 capable of many modiin the conbe" made without departing from the spirit and scope of the invention as disclosed in the appended claims.

What Iclaim asrnew and desire to secure by Letters Patent is: 1. In an QIIgXHBQiHHIlIFfIQIHo; a

"cylinder attached 'theretopan opening an saidl frame,

a closure fofisaid oPening- "tron bearings-therein;

having'anti frica crankshaft inxaid in an engine, wmain frame,

' attaohedthereto,

a :cylinder =an 1 opening in said frame,

a closure for said. opening having anti -frictxon hearings therein, a crank shaft-im said bearings; gears-on theerankshaft of sh afts geared 1 thereto andi ioeumaled ity = abpluralsembled and adapted' 'tobe inBe'rteddIr-said opening 'as a unit, a=-

openings therein and a flexible eouplinfg' f said'shafts to a sha 3.-In an engine, a main housing for saidigears,

'forsaidlast) mined shafts tb be drilyen thereby. frame; aeyl inder atached thereto, an openin in said frame; a.

=elosure for said 't-ion bearings =the bearings, a" bearings, "am

said parts" being opening iiaiving anti fricrein,

- said closure; all

beinsertedin said opennig as ammt;

4:. Inaneng11'1e,a crank'ease' havinga large and a small opening therein, for the-small opening;

therein-and a flyw h'eel on said shaffi' said for connecting each "a era'nk i shaft inf-said 11 an-on said' shaft between' said a shaft driven thereby having ball bearingsccarried b assembfedwhd adaptei to 'bled and'adap'ted to be inserted as a imit through said large opening.

- 5011i an-engine5 a large and a small opening for the small= opening, aj therein, a-flywheel onsaid" sure, shaft and 'and adapted to 'be' inserted said large openi' large opening.

shaft journaled 

